Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 20 for “"embryo survival"”.
-
Effects of Lipopolysaccharide Induced Inflammatory Response on Early Embryo Survival in Ewes
… coitus (dpc) were used as a model to study early embryonic loss via gram-negative bacterial infections, such as mastitis. Ewes 5/6 dpc were injected with a gram-negative bacteria cell wall component, lipopolysaccharide (LPS) or tumor necrosis factor-alpha (TNF-&agr;), to induce an innate immune …
-
Effects of Preovulatory Estradiol Concentration on Embryo Survival and Pregnancy Establishment in Beef Cows
… that preovulatory estradiol is important for embryo survival and pregnancy establishment in beef cows when all other variables were held constant. In order to establish the importance of estradiol during the preovulatory period on embryo survival, ovariectomized cows (n=24) received exogenous …
-
EVALUATING EMBRYO SURVIVAL OF SURROGATE FISH SPECIES USING MULTIPLE INCUBATORS: CONTINUING EFFORTS TOWARDS REINTRODUCING ARCTIC GRAYLING (THYMALLUS ARCTICUS) INTO LOWER MICHIGAN STREAMS
… Incubator (FBI), by directly comparing the survival of Rainbow Trout <em>Oncorhynchus mykiss</em>, Brook Trout <em>Salvelinus fontinalis</em>, and Walleye <em>Sander vitreus</em> (as Arctic Grayling surrogates) between RSI and FBI in stream and hatchery environments. In addition, I assessed …
-
Storage of mouse embryos of different genotypes
… of this study was to determine if either the embryo or maternal genotype contribute to the difference in the percentage survival of embryos after cooling and storage. A total of 2669 eight-cell mouse embryos of different genotypes (ICR, C57BL/6n, ICR x C57 and C57 x ICR) were stored for one …
-
Morphological and Hematological Responses to Hypoxia During Development in the Japanese quail, Coturnix coturnix
… duration and level of oxygen partial pressure of embryo. Incubation was switched to/from 110mmHg partial pressure (hypoxia), to/from 150mmHg (normoxia) during different stages in development, and control was incubated in normoxia throughout. Hatchability and embryo survival resulted in no …
-
Benzo[a]pyrene effects on Fundulus heteroclitus reproductive endpoints
… and subsequent hatching success of F1 embryos was significantly decreased by 10 μg/L BaP. In males, both gonadosomatic index (GSI) and plasma testosterone concentrations were significantly reduced compared to controls by 10 μg/L BaP. An increase in empty follicles and interstitial …
-
Synchronization and Resynchronization of Ovulation and Timed Insemination in Lactating Dairy Cows and Heifers
… (PR) for synchronized heifers was 60.1%, and embryo survival rate (ESR) was 98%. Pregnancy rate for CIDR-ECP treated heifers was influenced by artificial insemination (AI) time. In conclusion, ECP or GnRH may be used effectively in a CIDR-based TAI program in heifers. In the second study, cows …
-
Management and nutrition of the replacement gilt.
… or second oestrus on ovulation rate and early embryo survival. Gilts were artificially inseminated at the allocated oestrus, with the reproductive tracts collected at 22.8 ± 0.4 days after first mating (mean ± S.E.M), and the numbers of corpora lutea and viable embryos recorded. Delaying first …
-
Effects of Dietary Conjugated Linoleic Acid Supplementation on Bovine Oocyte Lipid Metabolism, Lipid Composition and Embryo Cryotolerance
Variation in cryotolerance exists between embryos from different animal breed, species and management conditions. Reduced tolerance to chilling and cryotolerance of oocytes and embryos has been associated with greater cytoplasmic lipids (Kim et al., 2001; Seidel, 2006). Previous studies in the cow …
-
The effect of interval between inseminations and semen handling on in-vivo and in-vitro fertility of frozen-thawed boar sperm
… inseminated at 4 h intervals. Litter size and embryo survival was not affected by insemination interval (P > 0.10). Gilts that ovulated by 36 and 48 h after the onset of estrus had greater pregnancy rates (P < 0.001) than those that ovulated by 24 and 60 h after the onset of estrus, but, estrus …
-
Modulation of bovine preimplantation embryonic development and pregnancy by FGF2, LIF, and IGF1
In vitro embryo production enhances genetic selection through capitalizing on superior genetics, improving fertility, and increasing animal efficiency, all of which contribute to sustainable food animal production. Of the livestock species, cattle use more embryo technologies than any other. While …
-
Analysis of mitotic and post-mitotic functions of Spindly in <i>Drosophila melanogaster</i>
… found that loss of Spindly disrupts normal embryonic development resulting in a deregulation of cytoskeletal components as well as an alteration of centrosome biology. A proteomic approach based on affinity-purified mass spectrometry experiments was undertaken to identify novel binding …
-
A Study of Mouse Peri-Implantation Morphogenesis
… constitutes a pivotal process during mammalian embryo development during which the blastocyst adheres to and implants into the maternal endometrium. This process is accompanied by major remodelling events in the embryonic and extraembryonic lineages from tissue level to single cell scale. With …
-
DOES FAT MATTER? Lipidomics investigations during Blue mussel (Mytilus sp.) hatchery production
… the ubiquitous role and importance of lipids for embryo survival and energetic turnover in different stages of the mussel life cycle. The novelty of this thesis is the comprehensive approach employed to investigate mussel lipids (the lipidome), combining fatty acid (FA) and lipid<br/>class …
-
Characterization and Role of Secretogranin-II/Secretoneurin in Zebrafish Reproduction
… is a key reproductive hormone. However, embryo survival rate of secretoneurin-a injected double secretogranin-II knockout was lower than saline-injected wild-type pairings. Injection of human chorionic gonadotropin, a hormone that mimics the action of luteinizing hormone on binding and …
-
Die Bedeutung der Embryonenqualität im Rahmen des Embryotransfers beim Rind – eine Literaturstudie
… of the estimation of the quality of cattle embryos in embryo transfer as well as to discuss the causes of the appearance of the variable embryo qualities after superovulation and the different possibilities to assess the embryo quality. After superovulation there are always variable embryo …
-
Role of Msx homeobox genes in uterus during embryo implantation
Implantation of the embryo into the wall of the uterus is a crucial event in mammalian embryogenesis. This complex event involves a series of interactions between the developing embryo and the receptive endometrium ultimately leading to successful establishment of pregnancy. The sequential events …
-
Estradiol-17beta-Oxytocin Induced Cervical Dilation in Sheep: Application to Transcervical Embryo
… to dilate the cervix and improve transcervical embryo transfer (ET) procedures for sheep. However, there was concern that the E2-OT treatment may alter luteal function and that embryo quality would decrease as the superovulatory response to FSH increased. In Exp. 1, 32 ewes were assigned to a 2 …
-
Lipid Quantification and Cryopreservation of In Vitro Produced Jersey Cattle Embryos
… of in vivo derived Jersey bovine embryos have resulted in a 10% lower pregnancy rate compared to other dairy breeds. Poor embryo survival after cryopreservation has been partially attributed to the high lipid content of Jersey embryos. In vitro-produced (IVP) bovine embryos have …
-
Lamb wastage and its association with ewe body condition
… There was significantly (P < 0.001) higher embryonic mortality up to scanning (23 & 19%, in 2002 & 2003 respectively) compared with losses from scanning to lambing (1 & 3%, in 2002 & 2003 respectively). There were highly significant (P < 0.001) differences between GR and LW of ewes at mating …